The clinical strains were also tested for their sensitivity against the standard,
succinic acid. For S.aureus determination (Kouidhi et al., 2010), the bacterium was pre-cultured in nutrient
broth overnight in a rotary shaker at 37°C and the cell density was standardized spectrophotometrically (A610
nm) equaled McFarland standard 0.5 in nutrient broth. The other procedures were same as above.